DERBY-5750(Sending an empty string as table name to compress table procedure or empty string as index name to update statistics procedure makes the parser throw an exception.)

Backporting to 10.8



git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/branches/10.8@1509814 13f79535-47bb-0310-9956-ffa450edef68